File: snd_ogg.c

package info (click to toggle)
darkplaces 0~20180412~beta1-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 18,200 kB
  • sloc: ansic: 176,886; makefile: 485; pascal: 455; perl: 372; objc: 245; sh: 102
file content (718 lines) | stat: -rw-r--r-- 18,681 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
/*
	Copyright (C) 2003-2005  Mathieu Olivier

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

*/


#include "quakedef.h"
#include "snd_main.h"
#include "snd_ogg.h"
#include "snd_wav.h"

#ifdef LINK_TO_LIBVORBIS
#define OV_EXCLUDE_STATIC_CALLBACKS
#include <ogg/ogg.h>
#include <vorbis/vorbisfile.h>

#define qov_clear ov_clear
#define qov_info ov_info
#define qov_comment ov_comment
#define qov_open_callbacks ov_open_callbacks
#define qov_pcm_seek ov_pcm_seek
#define qov_pcm_total ov_pcm_total
#define qov_read ov_read
#define qvorbis_comment_query vorbis_comment_query

qboolean OGG_OpenLibrary (void) {return true;}
void OGG_CloseLibrary (void) {}
#else

/*
=================================================================

  Minimal set of definitions from the Ogg Vorbis lib
  (C) COPYRIGHT 1994-2001 by the XIPHOPHORUS Company
  http://www.xiph.org/

  WARNING: for a matter of simplicity, several pointer types are
  casted to "void*", and most enumerated values are not included

=================================================================
*/

#ifdef _MSC_VER
typedef __int64 ogg_int64_t;
#else
typedef long long ogg_int64_t;
#endif

typedef struct
{
	size_t	(*read_func)	(void *ptr, size_t size, size_t nmemb, void *datasource);
	int		(*seek_func)	(void *datasource, ogg_int64_t offset, int whence);
	int		(*close_func)	(void *datasource);
	long	(*tell_func)	(void *datasource);
} ov_callbacks;

typedef struct
{
	unsigned char	*data;
	int				storage;
	int				fill;
	int				returned;
	int				unsynced;
	int				headerbytes;
	int				bodybytes;
} ogg_sync_state;

typedef struct
{
	int		version;
	int		channels;
	long	rate;
	long	bitrate_upper;
	long	bitrate_nominal;
	long	bitrate_lower;
	long	bitrate_window;
	void	*codec_setup;
} vorbis_info;

typedef struct
{
	unsigned char	*body_data;
	long			body_storage;
	long			body_fill;
	long			body_returned;
	int				*lacing_vals;
	ogg_int64_t		*granule_vals;
	long			lacing_storage;
	long			lacing_fill;
	long			lacing_packet;
	long			lacing_returned;
	unsigned char	header[282];
	int				header_fill;
	int				e_o_s;
	int				b_o_s;
	long			serialno;
	long			pageno;
	ogg_int64_t		packetno;
	ogg_int64_t		granulepos;
} ogg_stream_state;

typedef struct
{
	int			analysisp;
	vorbis_info	*vi;
	float		**pcm;
	float		**pcmret;
	int			pcm_storage;
	int			pcm_current;
	int			pcm_returned;
	int			preextrapolate;
	int			eofflag;
	long		lW;
	long		W;
	long		nW;
	long		centerW;
	ogg_int64_t	granulepos;
	ogg_int64_t	sequence;
	ogg_int64_t	glue_bits;
	ogg_int64_t	time_bits;
	ogg_int64_t	floor_bits;
	ogg_int64_t	res_bits;
	void		*backend_state;
} vorbis_dsp_state;

typedef struct
{
	long			endbyte;
	int				endbit;
	unsigned char	*buffer;
	unsigned char	*ptr;
	long			storage;
} oggpack_buffer;

typedef struct
{
	float				**pcm;
	oggpack_buffer		opb;
	long				lW;
	long				W;
	long				nW;
	int					pcmend;
	int					mode;
	int					eofflag;
	ogg_int64_t			granulepos;
	ogg_int64_t			sequence;
	vorbis_dsp_state	*vd;
	void				*localstore;
	long				localtop;
	long				localalloc;
	long				totaluse;
	void				*reap;  // VOIDED POINTER
	long				glue_bits;
	long				time_bits;
	long				floor_bits;
	long				res_bits;
	void				*internal;
} vorbis_block;

typedef struct
{
	char **user_comments;
	int   *comment_lengths;
	int    comments;
	char  *vendor;
} vorbis_comment;

typedef struct
{
	void				*datasource;
	int					seekable;
	ogg_int64_t			offset;
	ogg_int64_t			end;
	ogg_sync_state		oy;
	int					links;
	ogg_int64_t			*offsets;
	ogg_int64_t			*dataoffsets;
	long				*serialnos;
	ogg_int64_t			*pcmlengths;
	vorbis_info			*vi;
	vorbis_comment		*vc;
	ogg_int64_t			pcm_offset;
	int					ready_state;
	long				current_serialno;
	int					current_link;
	double				bittrack;
	double				samptrack;
	ogg_stream_state	os;
	vorbis_dsp_state	vd;
	vorbis_block		vb;
	ov_callbacks		callbacks;
} OggVorbis_File;


/*
=================================================================

  DarkPlaces definitions

=================================================================
*/

// Functions exported from the vorbisfile library
static int (*qov_clear) (OggVorbis_File *vf);
static vorbis_info* (*qov_info) (OggVorbis_File *vf,int link);
static vorbis_comment* (*qov_comment) (OggVorbis_File *vf,int link);
static char * (*qvorbis_comment_query) (vorbis_comment *vc, const char *tag, int count);
static int (*qov_open_callbacks) (void *datasource, OggVorbis_File *vf,
								  char *initial, long ibytes,
								  ov_callbacks callbacks);
static int (*qov_pcm_seek) (OggVorbis_File *vf,ogg_int64_t pos);
static ogg_int64_t (*qov_pcm_total) (OggVorbis_File *vf,int i);
static long (*qov_read) (OggVorbis_File *vf,char *buffer,int length,
						 int bigendianp,int word,int sgned,int *bitstream);

static dllfunction_t vorbisfilefuncs[] =
{
	{"ov_clear",				(void **) &qov_clear},
	{"ov_info",					(void **) &qov_info},
	{"ov_comment",				(void **) &qov_comment},
	{"ov_open_callbacks",		(void **) &qov_open_callbacks},
	{"ov_pcm_seek",				(void **) &qov_pcm_seek},
	{"ov_pcm_total",			(void **) &qov_pcm_total},
	{"ov_read",					(void **) &qov_read},
	{NULL, NULL}
};

static dllfunction_t vorbisfuncs[] =
{
	{"vorbis_comment_query",	(void **) &qvorbis_comment_query},
	{NULL, NULL}
};

// Handles for the Vorbis and Vorbisfile DLLs
static dllhandle_t vo_dll = NULL;
static dllhandle_t vf_dll = NULL;


/*
=================================================================

  DLL load & unload

=================================================================
*/

/*
====================
OGG_OpenLibrary

Try to load the VorbisFile DLL
====================
*/
qboolean OGG_OpenLibrary (void)
{
	const char* dllnames_vo [] =
	{
#if defined(WIN32)
		"libvorbis-0.dll",
		"libvorbis.dll",
		"vorbis.dll",
#elif defined(MACOSX)
		"libvorbis.dylib",
#else
		"libvorbis.so.0",
		"libvorbis.so",
#endif
		NULL
	};
	const char* dllnames_vf [] =
	{
#if defined(WIN32)
		"libvorbisfile-3.dll",
		"libvorbisfile.dll",
		"vorbisfile.dll",
#elif defined(MACOSX)
		"libvorbisfile.dylib",
#else
		"libvorbisfile.so.3",
		"libvorbisfile.so",
#endif
		NULL
	};

	// Already loaded?
	if (vf_dll)
		return true;

// COMMANDLINEOPTION: Sound: -novorbis disables ogg vorbis sound support
	if (COM_CheckParm("-novorbis"))
		return false;

	// Load the DLLs
	// We need to load both by hand because some OSes seem to not load
	// the vorbis DLL automatically when loading the VorbisFile DLL
	return Sys_LoadLibrary (dllnames_vo, &vo_dll, vorbisfuncs) && Sys_LoadLibrary (dllnames_vf, &vf_dll, vorbisfilefuncs);
}


/*
====================
OGG_CloseLibrary

Unload the VorbisFile DLL
====================
*/
void OGG_CloseLibrary (void)
{
	Sys_UnloadLibrary (&vf_dll);
	Sys_UnloadLibrary (&vo_dll);
}

#endif

/*
=================================================================

	Ogg Vorbis decoding

=================================================================
*/

typedef struct
{
	unsigned char *buffer;
	ogg_int64_t ind, buffsize;
} ov_decode_t;

static size_t ovcb_read (void *ptr, size_t size, size_t nb, void *datasource)
{
	ov_decode_t *ov_decode = (ov_decode_t*)datasource;
	size_t remain, len;

	remain = ov_decode->buffsize - ov_decode->ind;
	len = size * nb;
	if (remain < len)
		len = remain - remain % size;

	memcpy (ptr, ov_decode->buffer + ov_decode->ind, len);
	ov_decode->ind += len;

	return len / size;
}

static int ovcb_seek (void *datasource, ogg_int64_t offset, int whence)
{
	ov_decode_t *ov_decode = (ov_decode_t*)datasource;

	switch (whence)
	{
		case SEEK_SET:
			break;
		case SEEK_CUR:
			offset += ov_decode->ind;
			break;
		case SEEK_END:
			offset += ov_decode->buffsize;
			break;
		default:
			return -1;
	}
	if (offset < 0 || offset > ov_decode->buffsize)
		return -1;

	ov_decode->ind = offset;
	return 0;
}

static int ovcb_close (void *ov_decode)
{
	return 0;
}

static long ovcb_tell (void *ov_decode)
{
	return ((ov_decode_t*)ov_decode)->ind;
}

// Per-sfx data structure
typedef struct
{
	unsigned char	*file;
	size_t			filesize;
} ogg_stream_persfx_t;

// Per-channel data structure
typedef struct
{
	OggVorbis_File	vf;
	ov_decode_t		ov_decode;
	int				bs;
	int				buffer_firstframe;
	int				buffer_numframes;
	unsigned char	buffer[STREAM_BUFFERSIZE*4];
} ogg_stream_perchannel_t;


static const ov_callbacks callbacks = {ovcb_read, ovcb_seek, ovcb_close, ovcb_tell};

/*
====================
OGG_GetSamplesFloat
====================
*/
static void OGG_GetSamplesFloat (channel_t *ch, sfx_t *sfx, int firstsampleframe, int numsampleframes, float *outsamplesfloat)
{
	ogg_stream_perchannel_t *per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
	ogg_stream_persfx_t *per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
	int f = sfx->format.width * sfx->format.channels; // bytes per frame in the buffer
	short *buf;
	int i, len;
	int newlength, done, ret;

	// if this channel does not yet have a channel fetcher, make one
	if (per_ch == NULL)
	{
		// allocate a struct to keep track of our file position and buffer
		per_ch = (ogg_stream_perchannel_t *)Mem_Alloc(snd_mempool, sizeof(*per_ch));
		// begin decoding the file
		per_ch->ov_decode.buffer = per_sfx->file;
		per_ch->ov_decode.ind = 0;
		per_ch->ov_decode.buffsize = per_sfx->filesize;
		if (qov_open_callbacks(&per_ch->ov_decode, &per_ch->vf, NULL, 0, callbacks) < 0)
		{
			// this never happens - this function succeeded earlier on the same data
			Mem_Free(per_ch);
			return;
		}
		per_ch->bs = 0;
		per_ch->buffer_firstframe = 0;
		per_ch->buffer_numframes = 0;
		// attach the struct to our channel
		ch->fetcher_data = (void *)per_ch;
	}

	// if the request is too large for our buffer, loop...
	while (numsampleframes * f > (int)sizeof(per_ch->buffer))
	{
		done = sizeof(per_ch->buffer) / f;
		OGG_GetSamplesFloat(ch, sfx, firstsampleframe, done, outsamplesfloat);
		firstsampleframe += done;
		numsampleframes -= done;
		outsamplesfloat += done * sfx->format.channels;
	}

	// seek if the request is before the current buffer (loop back)
	// seek if the request starts beyond the current buffer by at least one frame (channel was zero volume for a while)
	// do not seek if the request overlaps the buffer end at all (expected behavior)
	if (per_ch->buffer_firstframe > firstsampleframe || per_ch->buffer_firstframe + per_ch->buffer_numframes < firstsampleframe)
	{
		// we expect to decode forward from here so this will be our new buffer start
		per_ch->buffer_firstframe = firstsampleframe;
		per_ch->buffer_numframes = 0;
		ret = qov_pcm_seek(&per_ch->vf, (ogg_int64_t)firstsampleframe);
		if (ret != 0)
		{
			// LordHavoc: we can't Con_Printf here, not thread safe...
			//Con_Printf("OGG_FetchSound: qov_pcm_seek(..., %d) returned %d\n", firstsampleframe, ret);
			return;
		}
	}

	// decompress the file as needed
	if (firstsampleframe + numsampleframes > per_ch->buffer_firstframe + per_ch->buffer_numframes)
	{
		// first slide the buffer back, discarding any data preceding the range we care about
		int offset = firstsampleframe - per_ch->buffer_firstframe;
		int keeplength = per_ch->buffer_numframes - offset;
		if (keeplength > 0)
			memmove(per_ch->buffer, per_ch->buffer + offset * sfx->format.width * sfx->format.channels, keeplength * sfx->format.width * sfx->format.channels);
		per_ch->buffer_firstframe = firstsampleframe;
		per_ch->buffer_numframes -= offset;
		// decompress as much as we can fit in the buffer
		newlength = sizeof(per_ch->buffer) - per_ch->buffer_numframes * f;
		done = 0;
		while (newlength > done && (ret = qov_read(&per_ch->vf, (char *)per_ch->buffer + per_ch->buffer_numframes * f + done, (int)(newlength - done), mem_bigendian, 2, 1, &per_ch->bs)) > 0)
			done += ret;
		// clear the missing space if any
		if (done < newlength)
			memset(per_ch->buffer + done, 0, newlength - done);
		// we now have more data in the buffer
		per_ch->buffer_numframes += done / f;
	}

	// convert the sample format for the caller
	buf = (short *)((char *)per_ch->buffer + (firstsampleframe - per_ch->buffer_firstframe) * f);
	len = numsampleframes * sfx->format.channels;
	for (i = 0;i < len;i++)
		outsamplesfloat[i] = buf[i] * (1.0f / 32768.0f);
}


/*
====================
OGG_StopChannel
====================
*/
static void OGG_StopChannel(channel_t *ch)
{
	ogg_stream_perchannel_t *per_ch = (ogg_stream_perchannel_t *)ch->fetcher_data;
	if (per_ch != NULL)
	{
		// release the vorbis decompressor
		qov_clear(&per_ch->vf);
		Mem_Free(per_ch);
	}
}


/*
====================
OGG_FreeSfx
====================
*/
static void OGG_FreeSfx(sfx_t *sfx)
{
	ogg_stream_persfx_t *per_sfx = (ogg_stream_persfx_t *)sfx->fetcher_data;
	// free the complete file we were keeping around
	Mem_Free(per_sfx->file);
	// free the file information structure
	Mem_Free(per_sfx);
}


static const snd_fetcher_t ogg_fetcher = {OGG_GetSamplesFloat, OGG_StopChannel, OGG_FreeSfx};

static void OGG_DecodeTags(vorbis_comment *vc, unsigned int *start, unsigned int *length, unsigned int numsamples, double *peak, double *gaindb)
{
	const char *startcomment = NULL, *lengthcomment = NULL, *endcomment = NULL, *thiscomment = NULL;

	*start = numsamples;
	*length = numsamples;
	*peak = 0.0;
	*gaindb = 0.0;

	if(!vc)
		return;

	thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_PEAK", 0);
	if(thiscomment)
		*peak = atof(thiscomment);
	thiscomment = qvorbis_comment_query(vc, "REPLAYGAIN_TRACK_GAIN", 0);
	if(thiscomment)
		*gaindb = atof(thiscomment);
	
	startcomment = qvorbis_comment_query(vc, "LOOP_START", 0); // DarkPlaces, and some Japanese app
	if(startcomment)
	{
		endcomment = qvorbis_comment_query(vc, "LOOP_END", 0);
		if(!endcomment)
			lengthcomment = qvorbis_comment_query(vc, "LOOP_LENGTH", 0);
	}
	else
	{
		startcomment = qvorbis_comment_query(vc, "LOOPSTART", 0); // RPG Maker VX
		if(startcomment)
		{
			lengthcomment = qvorbis_comment_query(vc, "LOOPLENGTH", 0);
			if(!lengthcomment)
				endcomment = qvorbis_comment_query(vc, "LOOPEND", 0);
		}
		else
		{
			startcomment = qvorbis_comment_query(vc, "LOOPPOINT", 0); // Sonic Robo Blast 2
		}
	}

	if(startcomment)
	{
		*start = (unsigned int) bound(0, atof(startcomment), numsamples);
		if(endcomment)
			*length = (unsigned int) bound(0, atof(endcomment), numsamples);
		else if(lengthcomment)
			*length = (unsigned int) bound(0, *start + atof(lengthcomment), numsamples);
	}
}

/*
====================
OGG_LoadVorbisFile

Load an Ogg Vorbis file into memory
====================
*/
qboolean OGG_LoadVorbisFile(const char *filename, sfx_t *sfx)
{
	unsigned char *data;
	fs_offset_t filesize;
	ov_decode_t ov_decode;
	OggVorbis_File vf;
	vorbis_info *vi;
	vorbis_comment *vc;
	double peak, gaindb;

#ifndef LINK_TO_LIBVORBIS
	if (!vf_dll)
		return false;
#endif

	// Return if already loaded
	if (sfx->fetcher != NULL)
		return true;

	// Load the file completely
	data = FS_LoadFile(filename, snd_mempool, false, &filesize);
	if (data == NULL)
		return false;

	if (developer_loading.integer >= 2)
		Con_Printf("Loading Ogg Vorbis file \"%s\"\n", filename);

	// Open it with the VorbisFile API
	ov_decode.buffer = data;
	ov_decode.ind = 0;
	ov_decode.buffsize = filesize;
	if (qov_open_callbacks(&ov_decode, &vf, NULL, 0, callbacks) < 0)
	{
		Con_Printf("error while opening Ogg Vorbis file \"%s\"\n", filename);
		Mem_Free(data);
		return false;
	}

	// Get the stream information
	vi = qov_info(&vf, -1);
	if (vi->channels < 1 || vi->channels > 2)
	{
		Con_Printf("%s has an unsupported number of channels (%i)\n",
					sfx->name, vi->channels);
		qov_clear (&vf);
		Mem_Free(data);
		return false;
	}

	sfx->format.speed = vi->rate;
	sfx->format.channels = vi->channels;
	sfx->format.width = 2;  // We always work with 16 bits samples

	sfx->total_length = qov_pcm_total(&vf, -1);

	if (snd_streaming.integer && (snd_streaming.integer >= 2 || sfx->total_length > max(sizeof(ogg_stream_perchannel_t), snd_streaming_length.value * sfx->format.speed)))
	{
		// large sounds use the OGG fetcher to decode the file on demand (but the entire file is held in memory)
		ogg_stream_persfx_t* per_sfx;
		if (developer_loading.integer >= 2)
			Con_Printf("Ogg sound file \"%s\" will be streamed\n", filename);
		per_sfx = (ogg_stream_persfx_t *)Mem_Alloc(snd_mempool, sizeof(*per_sfx));
		sfx->memsize += sizeof (*per_sfx);
		per_sfx->file = data;
		per_sfx->filesize = filesize;
		sfx->memsize += filesize;
		sfx->fetcher_data = per_sfx;
		sfx->fetcher = &ogg_fetcher;
		sfx->flags |= SFXFLAG_STREAMED;
		vc = qov_comment(&vf, -1);
		OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, sfx->total_length, &peak, &gaindb);
		qov_clear(&vf);
	}
	else
	{
		// small sounds are entirely loaded and use the PCM fetcher
		char *buff;
		ogg_int64_t len;
		ogg_int64_t done;
		int bs;
		long ret;
		if (developer_loading.integer >= 2)
			Con_Printf ("Ogg sound file \"%s\" will be cached\n", filename);
		len = sfx->total_length * sfx->format.channels * sfx->format.width;
		sfx->flags &= ~SFXFLAG_STREAMED;
		sfx->memsize += len;
		sfx->fetcher = &wav_fetcher;
		sfx->fetcher_data = Mem_Alloc(snd_mempool, (size_t)len);
		buff = (char *)sfx->fetcher_data;
		done = 0;
		bs = 0;
		while ((ret = qov_read(&vf, &buff[done], (int)(len - done), mem_bigendian, 2, 1, &bs)) > 0)
			done += ret;
		vc = qov_comment(&vf, -1);
		OGG_DecodeTags(vc, &sfx->loopstart, &sfx->total_length, sfx->total_length, &peak, &gaindb);
		qov_clear(&vf);
		Mem_Free(data);
	}

	if(peak)
	{
		sfx->volume_mult = min(1.0f / peak, exp(gaindb * 0.05f * log(10.0f)));
		sfx->volume_peak = peak;
		if (developer_loading.integer >= 2)
			Con_Printf ("Ogg sound file \"%s\" uses ReplayGain (gain %f, peak %f)\n", filename, sfx->volume_mult, sfx->volume_peak);
	}
	else if(gaindb != 0)
	{
		sfx->volume_mult = min(1.0f / peak, exp(gaindb * 0.05f * log(10.0f)));
		sfx->volume_peak = 1.0; // if peak is not defined, we won't trust it
		if (developer_loading.integer >= 2)
			Con_Printf ("Ogg sound file \"%s\" uses ReplayGain (gain %f, peak not defined and assumed to be %f)\n", filename, sfx->volume_mult, sfx->volume_peak);
	}

	return true;
}